<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div {
      width: 200px;
      height: 40px;
      background-color: palegoldenrod;
      text-align: center;
      line-height: 40px;
      margin: 50px auto;
      position: relative;
    }
    section {
      width: 400px;
      height: 400px;
      background-color: aquamarine;
      position: absolute;
      top: 40px;
      left: -200px;
      display: none;
    }
    div:hover section {
      display: block;
    }
  </style>
</head>
<body>
  <div>
    <a href="#">更多</a>
    <section></section>
  </div>
</body>
</html>